Ancient Fossils Reveal Victoria's Iconic Twelve Apostles Formed Recently

The dramatic sea stacks of the Twelve Apostles, a jewel of Victoria's coastline, are geologically much younger than their ancient-looking appearance might suggest. New research, published in the Australian Journal of Earth Sciences, has pinpointed the formation of these iconic monoliths to the last few thousand years, sculpted by relentless wave action and coastal erosion. While the stacks themselves are recent, the geological narrative of the Port Campbell coastal region stretches back millions of years. Lead author Stephen Gallagher from the University of Melbourne and his team have meticulously analyzed micro-fossils within the limestone cliffs, creating the most comprehensive timeline of the area's geological history to date. This study combines historical research from the 1960s with contemporary fieldwork, providing precise dating for sediment layers formed over a 16-million-year span. Crucially, the research confirms that the entire limestone landscape rose from the sea approximately 8.6 million years ago. For Australians, this research not only deepens our understanding of a beloved natural landmark but also highlights the dynamic geological processes that continue to shape our continent. ABC Australia's reporting emphasizes the scientific rigor and the fascinating insights gained, underscoring the value of local research in unraveling the natural history of iconic Australian sites.

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Suddenly we know exactly where in Earth history these layers are and we can get a climate record.